minor, parse qmeta and rmeta elements, and tws attribute

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, define subscription requests as tws_sreq_t linked list

This obsoletes the old stack based parsing.

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, adapt quo-tws to sreq objects, iterate after deserialisation

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, only call twsc_conn_clos() with non-NULL context

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, move unconst() global (to nifty.h)

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, quit support for multiple tws, shorten connections to a single URI

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, parse uri string into tws_uri_s object and use that throughout twsgluum

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, update sxe-compiler.m4 macro package

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist' into next

* bld/dist:
  chore, update sxe-compiler.m4 macro package
Merge branch 'feat/twsxml' into next

* feat/twsxml:
  minor, parse uri string into tws_uri_s object and use that throughout twsgluum
  minor, quit support for multiple tws, shorten connections to a single URI
  chore, move unconst() global (to nifty.h)
  fix, only call twsc_conn_clos() with non-NULL context
  minor, adapt quo-tws to sreq objects, iterate after deserialisation
  minor, define subscription requests as tws_sreq_t linked list
  minor, parse qmeta and rmeta elements, and tws attribute